I have not read all the replies you have received yet, so I hope what I have to say is not a repeat. If it is a repeat, maybe that is for a reason.

I was suicidal when I was 16 and on.... My Mother found out. She tricked me into therapy (disguised it as family therapy). She didn't know any better at the time, but that was a bad move.

My suggestion is this. Your son has already opened up to you a bit. Spend time with him and try to get him to open up again. If he doesn't and you are still worried about him, tell him he has a choice. Talk to you or someone else. Suicidal thoughts are serious. Sometimes people who do not truly mean to kill themselves actually do die.

I too will pray for you and your son.